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Rubber fig leaf, light micrograph
Brightfield light micrograph of a transverse section through a rubber fig (Ficus elastica) leaf. Within the upper epidermis (across top), is a lithocyst containing a cone-shaped cystolith (black) made of crystalised calcium carbonate on a cellulose stalk. Under the epidermis is the mesophyll layer with chlorophyll cells and vascular bundles., by MAGDA TURZANSKA / SCIENCE PHOTO LIBRARY
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